Jonathan Sher, The London Free Press

Jonathan Sher covers health for PostMedia and the London Free Press, has been named journalist of the year by his Ontario colleagues, has twice been a finalist for Canada's top award for public service journalism and has been a finalist or winner of 18 Ontario Newspaper Awards. Email jsher@postmedia.com or twitter @JSheratLFPress

Some Ontario doctors have ignored warnings about mixing two common drugs and now London researchers say they know the toll -- hundreds of seniors needlessly suffering kidney failure and some even death.